El Popo / Popocatepetl showed some action and distrubuted a cloud of ash.
Sunset at Puebla with erupting Popocatépetl:
Commenters speculated what the “second” plume could be. A forest fire? A industrial plume from a factory? Gas emissions? I still dont know for sure.
Geolurking provided a helpful link: http://www.ssd.noaa.gov/VAAC/messages.html
Parent page is at http://www.ssd.noaa.gov/VAAC/messages.html
Etnas “paroxysmic eruption” ( very nice word Newby) was most active very late in the night of April 12th.
Boris Behncke opinion: Paroxysm or no paroxysm?
Some activity ( glow) can still be seen on these cams: http://www.lave-volcans.eu/webcams_etna.php?numero=2
( Thanks KarenZ)
Alan C´s Evil riddle: The Answer was Ulexit:
Graniya: “Gigantic hunks of Ulexite are found in the form of fibrous, compact veins. When polished, these specimens become the well-known “Television Stone” or “TV Stone” sold to amateur collectors. The optical effect exhibited by Television Stone is caused by each of its individual fibers acting as fiber-optic cables, transmitting light from one surface to the other. Since all the fibers are parallel and compacted together, any image at below is transmitted through each crystal fiber to the top surface. For this effect to be seen, the specimen must be polished with smooth surfaces. Fibrous Ulexite bundles can also be carved into cabochons that display strong chatoyancy. However, due to its low hardness, it is unsuitable for gem use.”
Alan C: “Well, ’tis obvious that our Granyia is well read-up on AA Milne!
Winnie the Pooh fell into a gorse bush honey hunting
gorse is genus Ulex – the prckly subject – so we have Ulexite!! DING!!!
Ulexite (NaCa hydroxyborate) – nickname TV Mineral from optics c/f fibre optic cables”
Graniya had not read AA Milne but still got the right answer. 😉
dmf: “Here is the update on the density plotting for El Hierro. Up to the 12th.
In this plot the first part shows daily earthquake density with a mesh of 90 x 90 m.
For the last days the plot shows the limitation of the system. Too few earthquakes and too much dispersion (see the scale on the right blocked at 0.9)
The second part shows a cumulated earthquake density, with a day by day cumulation.
Data is from IGN & NOAA, made on Gnu Octave.
The second part shows very well the most active areas and the evolution of the quakes focus.”
And in Iceland:
The TFZ earthquake swarm is progressing north and now active around the island of Kolbeinsey, about 75 km north of Grímsey.http://en.vedur.is/earthquakes-and-volcanism/earthquakes/atlantic/ ( Thanks IngeB)